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WIP: Subscription mapping #2

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WIP: Subscription mapping #2

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23 changes: 13 additions & 10 deletions src/lib/store.js
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,8 @@ class Store {
}

subscribe(subscriber, props = []) {
const selectedProps = Array.isArray(props) ? props : Object.keys(props)
const selectedProps = Array.isArray(props) ? props.reduce((obj, val) => { obj[val] = val; return obj; }, {}) : props;
// selectedProps = { storeProp1 : subscriberProp1, storeProp2 : subscriberProp2, ... }
subscriber.setState(this.getSelectedState(selectedProps))
this.subscribers.push({ target: subscriber, props: selectedProps })
subscriber.__stores.push(this);
Expand All @@ -32,21 +33,23 @@ class Store {
}

getSelectedState(selectedProps) {
return selectedProps.reduce((selectedState, prop) => {
if (prop in this.state) {
selectedState[prop] = this.state[prop]
const selectedState = {}
for (let _storeProp in selectedProps) {
let _subscriberProp = selectedProps[_storeProp];
if (_storeProp in this.state) {
selectedState[_subscriberProp] = this.state[_storeProp]
}
return selectedState
}, {})
}
return selectedState;
}

updateSelectedState(updatedProps, subscribedProps) {
const _selectedState = {};
let _atLeastOneUpdate = 0;
for (var i = 0; i < subscribedProps.length; i++) {
const _prop = subscribedProps[i];
if (updatedProps === undefined || updatedProps[_prop] !== undefined) {
_selectedState[_prop] = this.state[_prop];
for (let _storeProp in subscribedProps) {
let _subscriberProp = subscribedProps[_storeProp];
if (updatedProps === undefined || updatedProps[_storeProp] !== undefined) {
_selectedState[_subscriberProp] = this.state[_storeProp];
_atLeastOneUpdate |= 1;
}
}
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